Exchange 2016/2019 shared mailbox

I would need an email client that can work with a shared mailbox created in Exchange 2016/2019.

Can you send me the type to the client's mail with settings?

While I read on the net and tried in the AppStore there is only support for 365.

Or is there a way for those who have an On Premis Exchange (such as 2016) to configure a shared mailbox in the "mail" app on the iPhone? Does Apple implement something like this in its application? Thank you for the quick reply.